{"product_id":"17548-vfactor-tuneable-mechanical-advance-kit-for-big-twin-sportster","title":"Ignition Part Mech Advance Kit Big Twin 70 \/ 79 Sportster 71 \/ 79 \u0026 Cus Ignition Tuneable W \/ Included Springs","description":"\u003ch1\u003eV-FACTOR TUNEABLE MECHANICAL ADVANCE KIT FOR HARLEY DAVIDSON BIG TWIN \u0026amp; SPORTSTER\u003c\/h1\u003eWEIGHT: 0.36\u003cbr\u003eDESIGNED TO OUTPERFORM AND OUTLAST ANYTHING OUT THERE , THIS TUNEABLE MECHANICAL ADVANCE UNIT IS THE FINEST AVAILABLE. IT FEATURES A HEAT TREATED STAINLESS STEEL BASE , PRE-LUBRICATED HEAT TREATED WEIGHTS AND THREE SETS OF COLOR CODED SPRINGS THAT ALLOW YOU TO SELECT THREE DIFFERENT ADVANCE CURVES TO MEET YOUR ENGINE'S REQUIREMENTS.\u003cbr\u003e\u003cbr\u003eTUNEABLE FEATURES:\u003cbr\u003eBLACK SPRING - ALLOWS FULL ADVANCE @ 1400 RPM (SAME AS OEM)\u003cbr\u003eSILVER SPRING - ALLOWS FULL ADVANCE @ 2000 RPM\u003cbr\u003eGOLD SPRING - ALLOWS FULL ADVANCE @ 2600 RPM\u003cbr\u003e\u003cbr\u003eADVANTAGES: ELIMINATING SPARK KNOCK AND DETONATION MEANS LONGER ENGINE LIFE AND MORE LOW END HORSEPOWER AND TORQUE.\u003cbr\u003e\u003cbr\u003eTHE ONLY MECHANICAL ADVANCE UNIT KIT THAT ALLOWS YOU TO ADJUST YOUR ADVANCE CURVE. A MUST IF YOU HAVE PERFORMANCE WORK DONE. EVEN MINOR PERFORMANCE CHANGES CAN REQUIRE A DIFFERENT ADVANCE CURVE.\u003cbr\u003e\u003cb\u003eV-FACTOR\u003c\/b\u003e\u003cbr\u003eSTAINLESS STEEL TUNEABLE MECHANICAL ADVANCE UNIT\u003cbr\u003eFITS BIG TWIN 1970\/1999 \u0026amp; SPORTSTER 1971\/2003\u003cbr\u003eALSO FITS AFTERMARKET ELECTRONIC IGNITION SYSTEMS THAT REQUIRE A MECHANICAL ADVANCE UNIT\u003cbr\u003e(IMPORTED)","brand":"MID-USA","offers":[{"title":"Default Title","offer_id":20199434485871,"sku":"17548","price":83.94,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0081\/7401\/0479\/products\/0076991_0.jpg?v=1575409841","url":"https:\/\/www.widowmakersboneyard.com\/products\/17548-vfactor-tuneable-mechanical-advance-kit-for-big-twin-sportster","provider":"Widowmaker's Boneyard","version":"1.0","type":"link"}